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Dorman - First Stop Brake Master Cylinder P/N:M630646
$200.99
Keep the hydraulic heart of your brake system working with the Dorman - First Stop Brake Master Cylinder (M630646). This master cylinder converts brake-pedal force into the hydraulic pressure that feeds the brake circuits, and it drops in as a direct-fit replacement for the 2004-2006 Toyota Tundra (All engines).
- Aluminum housing: the cylinder housing is constructed to match the casting material of the original part for similar performance.
- EPDM rubber components: all rubber parts use a high-quality EPDM compound for resistance to glycol-based brake fluid.
- 100% new, built to spec: made entirely of new materials — not remanufactured — and produced to meet rigorous SAE International standards.
- What's in the box: master cylinder with reservoir and sensor included. Two outlets, a 0.75 in bore, and an M10 x 1.0 secondary/rearward outlet thread. Mounting hardware is not included — consult the vehicle service information for the correct fasteners and whether they may be reused.
If a failed master cylinder is the cause of a sinking or spongy pedal or an internal fluid leak, this unit replaces it. Country of origin: China.
Interchange: 100-4201 · 11-2929 · 130.44735 · 355-76138 · NM55666 · MC391073 · 472070C010 · F142721 · F144045 · MC142721 · MC144045 · Manufacturer part number M630646.
This part cross-references / interchanges with the following part numbers:
100-4201, 11-2929, 130.44735, 355-76138, NM55666, MC391073, 472070C010, F142721, F144045, MC142721, MC144045
Frequently Asked Questions
What does this master cylinder do?
It converts the force from your brake pedal into hydraulic pressure that is sent through the brake circuits to apply the brakes.
Which vehicle does M630646 fit?
It is a direct-fit replacement for the 2004-2006 Toyota Tundra (All engines). See the Buyer's Guide tab to confirm fitment for your vehicle.
What comes with this master cylinder?
The master cylinder ships with a reservoir and sensor included. Mounting hardware is not included; consult the service information for the correct fasteners.
What is it made of?
The housing is aluminum, constructed to match the casting material of the original part, and all rubber components use a high-quality EPDM compound for resistance to glycol-based brake fluid.
What are signs the master cylinder may need replacing?
A pedal that slowly sinks to the floor, a spongy pedal, or internal/external fluid leaks may be signs. Diagnose the cause first, as these symptoms can have other sources.
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Dorman - First Stop Brake Master Cylinder P/N:M630646
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